Do you think that 'standard' tuning is a misleading name? It's only been common for a fraction of the history of guitar like instruments.
As fripp said its "mandatory". Its just that way because it was probably easiest for a luthier 500 years ago. The standard tuning is illogical(holdsworth has said as much) but I'm not going to relearn now. Maybe Fripps tuning is a better idea?